{"id":18204,"date":"2020-06-27T10:00:23","date_gmt":"2020-06-27T10:00:23","guid":{"rendered":"https:\/\/www.radiation-dosimetry.org\/quais-sao-as-caracteristicas-da-radiacao-de-neutrons-definicao\/"},"modified":"2020-07-24T10:20:34","modified_gmt":"2020-07-24T10:20:34","slug":"quais-sao-as-caracteristicas-da-radiacao-de-neutrons-definicao","status":"publish","type":"post","link":"https:\/\/www.radiation-dosimetry.org\/pt-br\/quais-sao-as-caracteristicas-da-radiacao-de-neutrons-definicao\/","title":{"rendered":"Quais s\u00e3o as caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons &#8211; Defini\u00e7\u00e3o"},"content":{"rendered":"<div class=\"su-quote su-quote-style-default\">\n<div class=\"su-quote-inner su-u-clearfix su-u-trim\">As principais caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons podem ser resumidas em alguns pontos.\u00a0A princ\u00edpio, os n\u00eautrons s\u00e3o part\u00edculas neutras, ionizam a mat\u00e9ria apenas indiretamente.\u00a0Dosimetria de Radia\u00e7\u00e3o<\/div>\n<\/div>\n<div class=\"su-divider su-divider-style-dotted\"><\/div>\n<div class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights lgc-first lgc-last\">\n<div class=\"inside-grid-column\">\n<p>As principais caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons est\u00e3o resumidas em alguns pontos a seguir:<\/p>\n<ul>\n<li>N\u00eautrons s\u00e3o\u00a0<strong>part\u00edculas neutras<\/strong>\u00a0&#8211; sem carga el\u00e9trica l\u00edquida.<\/li>\n<li>N\u00eautrons\u00a0<strong>n\u00e3o podem causar\u00a0<a title=\"Formas de radia\u00e7\u00e3o ionizante\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/forms-ionizing-radiation\/\" target=\"_blank\" rel=\"noopener noreferrer\">ioniza\u00e7\u00e3o<\/a><\/strong><strong>\u00a0diretamente<\/strong>\u00a0.\u00a0Os n\u00eautrons ionizam a mat\u00e9ria apenas indiretamente.<\/li>\n<li>Os n\u00eautrons se espalham com n\u00facleos pesados\u00a0<strong>muito elasticamente<\/strong>\u00a0.\u00a0N\u00facleos pesados \u200b\u200bmuito duramente desaceleram um n\u00eautron e muito menos absorvem um n\u00eautron r\u00e1pido.<\/li>\n<li>Os n\u00eautrons podem viajar centenas de p\u00e9s no ar sem nenhuma intera\u00e7\u00e3o.\u00a0A radia\u00e7\u00e3o de n\u00eautrons \u00e9\u00a0<strong>altamente penetrante<\/strong>\u00a0.<\/li>\n<li>Para absorv\u00ea-los, os n\u00eautrons devem ser primeiro diminu\u00eddos de velocidade.\u00a0Este ponto pode ser cumprido apenas por material contendo\u00a0<strong>n\u00facleos leves (por exemplo, n\u00facleos de hidrog\u00eanio).<\/strong><\/li>\n<li>Uma absor\u00e7\u00e3o de n\u00eautrons (diria-se blindagem) causa o in\u00edcio de certa\u00a0<a title=\"Intera\u00e7\u00f5es de n\u00eautrons com mat\u00e9ria\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/interactions-neutrons-matter\/\" target=\"_blank\" rel=\"noopener noreferrer\">rea\u00e7\u00e3o nuclear<\/a>\u00a0\u00a0(por exemplo, captura radiativa ou at\u00e9\u00a0<a title=\"Fic\u00e3o nuclear\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/fission\/\" target=\"_blank\" rel=\"noopener noreferrer\">fiss\u00e3o<\/a>\u00a0), que \u00e9 acompanhada por v\u00e1rios outros\u00a0<a title=\"Formas de radia\u00e7\u00e3o ionizante\" href=\"https:\/\/www.nuclear-power.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/forms-ionizing-radiation\/\" target=\"_blank\" rel=\"noopener noreferrer\">tipos de radia\u00e7\u00e3o<\/a>\u00a0.\u00a0Em resumo, os n\u00eautrons tornam a mat\u00e9ria radioativa; portanto, com os n\u00eautrons, temos que proteger tamb\u00e9m os outros tipos de radia\u00e7\u00e3o.<\/li>\n<li><strong>Os n\u00eautrons livres<\/strong>\u00a0(fora de um n\u00facleo) s\u00e3o inst\u00e1veis \u200b\u200be decaem por decaimento beta.\u00a0O decaimento do n\u00eautron envolve a intera\u00e7\u00e3o fraca e est\u00e1 associado a uma transforma\u00e7\u00e3o de quarks (um quark down \u00e9 convertido em um quark up).<\/li>\n<li>A vida \u00fatil m\u00e9dia de um n\u00eautron livre \u00e9 de 882 segundos (ou seja, a\u00a0<strong>meia-vida<\/strong>\u00a0\u00e9 de 611 segundos).<\/li>\n<li>Um\u00a0<strong>fundo natural de n\u00eautrons<\/strong>\u00a0de n\u00eautrons livres existe em toda parte da Terra e \u00e9 causado por m\u00faons produzidos na atmosfera, onde raios c\u00f3smicos de alta energia colidem com part\u00edculas da atmosfera da Terra.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div><\/div>\n<div>\n<p>&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;.<\/p>\n<p>Este artigo \u00e9 baseado na tradu\u00e7\u00e3o autom\u00e1tica do artigo original em ingl\u00eas. Para mais informa\u00e7\u00f5es, consulte o artigo em ingl\u00eas. Voc\u00ea pode nos ajudar. Se voc\u00ea deseja corrigir a tradu\u00e7\u00e3o, envie-a para: translations@nuclear-power.com ou preencha o formul\u00e1rio de tradu\u00e7\u00e3o on-line. Agradecemos sua ajuda, atualizaremos a tradu\u00e7\u00e3o o mais r\u00e1pido poss\u00edvel. Obrigado.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>As principais caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons podem ser resumidas em alguns pontos.\u00a0A princ\u00edpio, os n\u00eautrons s\u00e3o part\u00edculas neutras, ionizam a mat\u00e9ria apenas indiretamente.\u00a0Dosimetria de Radia\u00e7\u00e3o As principais caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons est\u00e3o resumidas em alguns pontos a seguir: N\u00eautrons s\u00e3o\u00a0part\u00edculas neutras\u00a0&#8211; sem carga el\u00e9trica l\u00edquida. N\u00eautrons\u00a0n\u00e3o podem causar\u00a0ioniza\u00e7\u00e3o\u00a0diretamente\u00a0.\u00a0Os n\u00eautrons ionizam a mat\u00e9ria apenas &#8230; <a title=\"Quais s\u00e3o as caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons &#8211; Defini\u00e7\u00e3o\" class=\"read-more\" href=\"https:\/\/www.radiation-dosimetry.org\/pt-br\/quais-sao-as-caracteristicas-da-radiacao-de-neutrons-definicao\/\" aria-label=\"More on Quais s\u00e3o as caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons &#8211; Defini\u00e7\u00e3o\">Ler mais<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[51],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Quais s\u00e3o as caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons - Defini\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"As principais caracter\u00edsticas da radia\u00e7\u00e3o de n\u00eautrons podem ser resumidas em alguns pontos. 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